Portable telescoping elevator.



s. B. MNNIcH. PORTABLE TELESGOPING ELBVATOB..

APPLIUATION FILED DBO. 8, i908.

Patented oct. 19,1999.

3 SHEETS-SHEET 1.

: LMWIWIWI A S. B. MINNICH. PORTABLE TELESGOPING ELEVATOE.

#u alf w 3| V w. i n vllul j al ru Il.. l 2 7 A S 2 3 3 u 2, f M f 1 l l nl- 6l; Ilm s .Il 6, Y w 7 n@ FC 9 APPLICATION PILBD DEO. 8, 1908.

l Patented Oct. 19, 1909.

- INVENoR Simon B.77innich.,

` WITNESSES:

UNITED STATES PATENT OFFICE., srMoN B. MNNIcH, oE/LANDI'svI'LLE, ,rENNsIvANIa AssIeNon To MARY c.vv MINNICH, or LANmsvILLE, PENNSYLVANIA.

PORTABLE TELEscoPINe EnEV-Aron.

To all whom 'it 'may concern.'

Beit known that I, SIMON B. MINNICH,

citizen' of the United States, residing at Landisville, in the county of Lancaster and State of Pennsylvania, have invented certainnew and useful Improvements in P0rtable Telescoping Elevators, ofwhich thel following isa specification, reference 'being had therein to the accompanying drawing.

My invention relates to a portable elevator or hoist, such as is used to elevate merchandise in store-houses and for like purposes, and it more fully relates to that class of elevators or hoists which are vdesigned to be readily moved from place to place, either while not in use or after the merchandise is placed thereon and moved to another location before elevating.

The objects of the invention are to pro duce a device of this kind that will have ample lifting power, besimple of operation and readily portable; -and also by my novel construction of telescoping, the height may be reduced atwill to enable the apparatus to be moved through low doorways and to be .operated in buildings with low ceilings.

With these and other objects in View my invention consists incertain novel construction and combination of parts as will hereinafter be fully described and claimed in the annexed specification and illustrated in the accompanying drawings forming part of the application, but it is fully understood that vwhile I have here described my invention as illustrated in the accompanying drawings, it is fully understood that slight changes may be made in the construction and combination of the parts, without departing ,from the spirit of the invention.

In the drawings Figure 1, is a rear ele- 'vation of, the apparatus, showing the elefvator in a partly raised position. Fig. 2', is a Ytop lplan view of the same. Fig. 3, 1s a side elevation of the same, with the drawing handle added. Fig. 4, is a vertical sectionalv view taken on theline X X of Fig. 31'ook- F'g.V 5,y is a `front elevation of the apparatus.

Referring-tothe drawings 1n which like figures of reference indicate corresponding parts in all the views', 1, indicatesa 'tril angular base plate which is formed wlth the two circular. bosses 2, near the front end and integral therewithand connected to each other .and totli;e plate 1, by thewall' 3, while Specication of Letters Patent.

the rear end or apex of said base 1, terminates in the goose neck 4, which is formed with a'verti'cal bearing 5, in the body thereof. Said base plate l, is supported and secured upon the frame 6, (which is here shown as constructed of angle-iron) and to the forwardy end of said Vframe 6, within said angle is secured the axle 7, upon the ends of which are secured the wheels 8, while pivotally mounted within the vertical bearing 5, in the goose neck 4, is the forked shaft 9, within the forks of which is mounted the wheel 10, by. the pin 11, which completes a three wheeled truck, and it may be here stated that any wellknown form of a drawing handle 56', may be attached to said swivel Wheel for the purpose of guiding and propellingsaid apparatus, and also for anchoring the apparatus in place by gripping the wheel or iioor 'by the points 57. lWithin said bosses 2, are screw-threaded or otherwise secured the lower ends of the tubular hollow posts 1,2, 4which extend upward in a vertical relation to the base and parallel to each other, while within the upper portion of said posts 12, are slidably mounted in a telescoping manner the tubes 13, whichhave their upper ends joined together by the crossbarl. Within the lower ends of said tubes 13, are rigidly secured the plugs or nuts 15,

ratented oet, 1a, 1909.* Application fled December 8., 190,8; Serial No. 466,452. l.

which are engaged by the elevating screws Y 1G, which are f threaded therethrough, and which are here shown as having right and left hand threads. Said elevating screws 16, are providedfnear their lower ends with the collars 17, which are rigidly secured thereon and which are designed to be yrotated within the lower ends of the hollow posts 12, and with their lower surfaces bearing upon the frame .6, thus supporting the tubes; 13, upon the elevating screws 1 6, and within the tubes 12; while the lower ends of said screws 16,-beyond the collars 17, project through` said frame 6,I and have rigidly secured thereon the bevel gears 18, which are in mesh with the bevel gears 55, which are rigidly secured upon the ends of the hori-' zontal shaft- 19, whichlis mounted inthe bearings 20, which lare secured to the under surface of the frame 6. f

It may here be noted that while I have here shown the elevating screws 16, to have right and vleft hand threads, respectively, and lthe 'bevel' gears 55, to be in -mesh withv the .inner sides of the gears 18, one of said gears` vgears 18, thus `allowing the two elevating screws to be of the same thread. 'r j The elevator platform or conveyeris constructed of'the supports 21, which are preferably of angle-iron and which are. formed with the upwardly and rearwardly extendingportions 22, which a/re placed one on each side of the posts 12, and which are secured 4in pairs by the shafts 23,l and upon said shafts 23, .are rotatably mounted the rollers 24, which are. formed with a curved face to conform to the outer diameter of the posts 12, and are adapted 'to roll thereon, the lower ones against the forward side, and the upper onesy against the rear side of said posts an also upon the tubes above said posts in the .same manner, thus retaining the supportingportions 21, in a horizontal po'si'- tion, while upon the upper surface .of' said supporting portions 21, is secured theplatform 25, which also serves to retain said supports in a properly spaced and rigid manner.

The elevator raising and lowering mechanism consists lof the cable or `chain 26, one end of which is secured tothe yoke 27, which 4is secured to the supports 22, and is then -carried up and over the sheave wheel 28,

which is mounted inthe bracket 29,l secured to thecross-bar14, and thence downward with its end secured to the winding shaft 30, which is mountedin and between the v bearing plates 31, and 32, which have their lower ends secured to the basel.

Y Near the lower ends and between the bearing plates .31, and 32, is secured the cross-` brace 33, while upon said crossfbrace 33, is

lmounted the bearing 34, within which is ro-A tatably mounted the shaft 35, which is squared atone end to receive a wrench or hand-crank, and `upon its other end is ri idly secured the sprocket wheel 36, which 1s belted by the sprocket chain 37, to' thel sprocket wheel 38, ,which isrigidly secured x u 'on the' shaft 19, and which operates the 't escoping device. The bearing plate 32, is

i .provided withv the outer bearing'plate 39,

secured. thereto; lWhile -between said plates 32, `and 39, ismounted the spur gear 4 0,

' rigidly secured upon the winding shaft 30,

[and in mesh` wit l the pinion '41, which is ri idly secured upon the 'short' shaft 42, w ichv is rotatably mounted 'in saidbearing I plates 32, and 39.

-U 'on the shaft 42, without thegbearing "plate-39, isrigidly secured the ratchet wheel veo 43,-and the brake band drum'44, while the end of said shaft 42, is squared to admit of a hand-crank4 (not shown) to rotate the same.

The action of the ratchet wheel 43, is-.con-

vtrolled by the dog 45, which is pivoted on the end of the stud 46, and which is operated by the hand lever 47. "The brake band 48, is passed .around the drum 44,` 'and has its ends While the proportion of the gears 40, and

41, is such that the winding and raising of the elevator latform will be easy under a load, I have a so provided the gear 53, which also meshes with the gear'40, and is mounted upon the shaft 54, which is rotatably mounted in the bearing plates 32, and 39, and which is also provided with a squared y"end for. a hand-crank, and owing to the fact that said gear 53, is of much greater diameter than the gear 41, by its use the operation of winding will be much faster, but the leverage will not be .obtained to elevate such a heavy load as by the` gear 41.

The o eration of the a paratls as a whole is as fo lows The desired height of the telesco ing ldevice is attained bythe operation o the elevating screws raising or lowering the nutseand tubes bythe revolution of the bevel gears, sprockets and chain, and as actuated bythe shaft. The-desired height having'been reached after having passed the apparatus through a doorway, the elevator platform may be raised byrotating either theshaft 42, or the shaft 54, according to ters Patent is:-

1. An apparatus of the class described, comprising a base plate in the form of a truck, upright hollow. post-s having their lower ends secured to said base plate and in a parallel relation with each other, hollow tubes slidably mounted within said posts and connected together at their upper ends, and having the walls of their lower ends. thickened and screw-threaded, elevating screws mounted within said-hollow tubes and posts ,having their body portions threaded through the lower ends of said tubes and their lower ends rotatably mounted; in and extending through said ase plate, bevel gears secured -upon the lower projecting ends of said screws, a horizontal shaft mounted under 'said base, plate, bevel ears secured upon said shaft and. in' mes with said bevel gears uson said screws, and means for rotatln sai shaft, an` elevating lplatform slid- I claim as new and-desire to secureA by Letab y. mounted upon said posts and tubes,

means for raisin .and lowering said platform and means or controlling the speed of -said raising and lowering.

2. An apparatus of the class described,

-camisa the lower ends of the outer pair of uprights', a cross-bar secured to the upper ends of thel inner pair of uprights, elevatingscrews contained within said telescoping uprights with g their lower ends mounted-in bearings inlsaid l base plate and having their body portions platform.

. 3.. An apparatus .ofthe class" described, comprising a base plate, wheels supporting said base plate, telescoping uprights mount'- v ed upon vsaid base plate,jelevat1ng screws `extending and contracting mounted in bearings in' said base plate and.

screw-threaded into'the sliding members of said telescoping uprights and-adapted for l'said telescoping uprights, an elevating mounted' upon said uprig secured to said base plate, a 4mainwindingshaft mounted in lsaid bearing plates, and means for operating 4the same, a pulley mounted near the` u per end of said 'telet scoping uprights, an a'lifting cable passed lat-,form slid-ably.` tal-bearing plates.

.=over said pulley and having one end secured to said elevating platform and the other end secured to said winding-shaft and adapted to be wound thereon. l'

4. An apparatus of the class described, comprising telescoping uprights joined together at their upper ends andv mounted upon a movable base,'an elevating platform slidably mounted upon said uprights, a forward bearing plate and a rear bearing plate lsecured upon said base and an outer bearing plate secured tosaid rear bearing plate and spaced therefrom, a main winding shaft mounted in said bearing plates, secured upon said winding shaft and adapted tarot-ate the same, a hand-crank shaft mounted in said bearing plates parallelland adjacent to said winding shaft, a pinion secured upon said shaft arid in mesh` with a main gear said main gear, a ratchet wheel secured upon 'said hand-crank shaftf and a vbrake drum .secured upon said shaft in contact with said ratchet wheel, a ratchet dogpivoted upon said outer bearing .plate and adapted to engage said ratchet, and a band `brake mounted upon said outer bearingplate'and i B0 In testimony whereof I 'affix my signature adapted to'engage said brake drum.

in presence of two witnesses.

VVitnesses': I WM. J. COULTER, f 'MABEL L. LnFEvnn.

SIMON B. MINNICH'. 

